Brain Stem
TweetThis part of the brain developed early in evolution. It contains multiple nuclei and serves multiple functions related to sensory processes, motor processes, arousal, as well as the basic vital functions.Note: The image below shows the brain stem in addition to the diencephalon, which is part of the forebrain.
Basal Ganglia
TweetThis term refers to several functionally diverse subcortical brain structures including the caudate nucleus, putamen, globus pallidus, substantia nigra, and subthalamic nuclei. The amygdala is sometimes classified as part of the basal ganglia.